Bending machine



July 17, i923.

M. R. AKEY ET AL BENDING MACHINE 1919 3 Sheets-Sheet 1 Original FiledAug. 5,

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BENDING MACHINE original Filed Aug. s, 1919 s sheets-sheet 2 July 17,1923.`

M. R. AKEY ET AL BENDING MACHINE 3 vSheets-Shed'l 5 Original` Filed Aug.5, 1919 by the line 2-2 of Figure :1. Figure 3 is av Patented .lilly17,1923.

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MEADER R. AKEY, 0F SACRAMETO, AND HEBJIWAN KATZ, OF OAKLAND, CALORNIA.

BENDING MACHINE.

Application led August 5, 1919, Serial No. 315,488.` Renewed December14, 1922.

T0 all whom t may concer/a.

Be it lrnown that we, MEADER R. AKEY, a citizen of the United States,and' a resident of Sacramento, county of Sacramento, State ofCalifornia, and HERMAN KATZ, a citizen of the United States, and aresident ofOalland, county of Alameda, and State of California, haveinvented a new and useful Bend ing Machine, of which the following is aspecification.

Our invention relates to apparatus for bending structural steel shapes.

An object of the invention is to provide a machine for rapidly andvaccurately bending structural steel shapes, especially angles andchannels.

The invention possesses other features of advantage, some of which, withthe foregoing, will be set forth in the following description of thepreferred form of our invention which is illustrated in the drawingsaccompanying Vand forming part of the specification. lt is to beunderstood that we do not limit ourselves to the showing made by thesaid drawings and description, as we may adopt variations of thepreferred form within the scope of our invention as set forth in theclaims.

Referring to the :drawings: i

Figure 1 is a plan view of the bending ma chine of our invention. Figure2 is a vertical sectional view taken in the plane indicated plan viewyof a portion of the machine, showing thek bed or foundation plate andremovable forms. Figure 4 is a vertical sectional view takentransversely through a portion of the apparatus in a plane indicated bythe line 4-4 of Figure 2. Figure 5 is a vertical sectional view takentransversely through a portion of the apparatus in a plane indi-v catedbythe line 5 5 of Figure 2, and showing a hoisting chain attached to theapparatus. Figure 6 is a plan view, partly in section, and on anenlarged scale of a portion of the guide arms. Figure 7 is a verticalsectional view through one of the guide boxes, taken in a planeindicated by the line 7-7 of Figure 6.v Figure 8, is a verticalsectional view similar to Figure 2,*but showing a modified formofapparatus. Figure 9`is a vertical sectienal view similar to Figure 7but showing a modified form of guide box used with the modified form ofmachine shown in Figure A8. Figure 10 is a plan view 'used in thepresent instance.

apparatus. Figure 11 is a vertical sectional view through oneof theguide boxes of the structure shown in Figure 10, the planey of sectionbeing indicated by the line 11--11 of that figure. Figure 12 is avertical sectional view taken in the plane indicated by the line 12-12of Figure 10.

Referring rst to the structure shown in Figures 1 to 7 inclusive, thebending machine comprises a foundation or bed plate 2 upon which asemi-annular plate 3provided with gear teeth 4 is pivotally mounted bypins 6. During thefuseof the bending machine the gear plate 3 is securedin position upon the bed plate by a key 7 passed through a vertical stud8. The under side of the gear plate is formed to accommodate thesegmental or sectional forms 9, two of which are The forms eachcomprisea segmental plate provided with a lug 11 adapted to engage in arecess formed in the bed plate, to fix the position of the formsthereon, and also provided with a peripheral ange 13, conically formedon the inner face 14, and adapted to lie against the similarly formedunder side of the gear plate 3. As shown in Figure 2 the short verticalleg 16 of the angle which is to be bent, engages the peripheral surfaceof the form flange 13, and the long horizontal leg 17 of thev angle liesbetween the lower face of the form and the upper face of the edge 18 ofthe bed plate.

Slidably mounted in the ways 19 of the plate is a block 21. A shaft 22is rotatable in the block and is threaded through the loose bridge 23,adapted to seat against the lugs 24; on the bed plate.v A handle 26 isprovided for turning the shaft to move the block 21 toward the lugs.Pivotally mounted on the block 21 for movement in a vertical plane is asaddle 27, and pivotally mounted on the saddle for movement is ahorizontal plane are twin arms 28 preferably formed of cylindrical pipe.In slidable far end adjacent the outer end of `the arm sleeves 29. Fixedon each sleeve 29' is a bracket 41, on the outer end of which is pivoteda box42 adapted `to enclose the angle 16417 which is to be bent. Asshown in .Fioures '6 and 7 the box is rovided with f a hinged cover 43adapted toy be held close 4Athe' being bent. n. f inside asshown by thedotted line 47 vthat it *canl be swung into engagement with the againstthe shape by latches 44. Rollers are preferably suitably mounted in thebox to lessen the friction during the sliding movement of the box on theshape when it is The box isso formed on the so placed as tov lieopposite the peripheral face of the forms 9.

The rollers are provided with gear teeth 52 adapted to mesh `withthefteeth 4 of the plate 3 when the rollers are moved'iinto contact withthe angle lying against the forms. In order to raise and lower thetoothed plate and' the'overlying pivoted structure an eye 53 is ar`ranged inthe toothed plate adapted to be lcaught by the hook 54 'on theend of the chain 56 running to a suitably arranged winch y(not shown).The hook 54 carries a gravity operated yoke 57 adapted to engage sleeves29' to prevent them from spreading. A Y

yOperation: The `forms 9 being placed in position on the bed plate, thepivoted gear i plate 3 is lowered and locked flat upon vthe g tureformed of the sleeve 29, rim 36 and bracket 41 to revolve about thevertical pivot on they saddle 27, swinging the rollers bed plate by thekey 7, and the heated angle to be bent is pushed into position on theforms and the boxes 42 closed about it.k

The rollers 51 are next moved inwardly to f engage the outer face of thevertical leg of.

the angle, and-to engage the gear teeth 4 and' 52, by turning the screw22, the vertical axis of the arms 28 then being coincident with thecenter of the plate 3. Power is then applied to the winch controllingthe cables 37. This causes each quadrant struc- 51 in an arc concentricto the curve of the forms 'and rolling the hot angle 'into close contactwith the forms, the rollers rolling u'ponfthe 'angle by reason ofthe'enlgagement oftheir teeth 52 with the gear' teeth 4 on the plate 3.Since the longleg of the angle is held between the form and the rollersreach the ends of the curved forms, the ends 61 of the rifrn'sinterlock, and

the twoV quadrant structurestogether with the block 21 and bridge 23move backwardly as one, the block 21 sliding. in the bed .plate ways 19,and the rollers 51 pressing the ends of the angle against the parallelfaces 62 of 'l the bed plate. `When the operation 1s completed, theboxes 42 are disengaged andthe quadrant structuresv are turned back tofirst position to freethe rollers frointhe bent shape, the chain 56hooked intoithe eye 53,

the yoke 57 slipped over the arm sleeves, the

key 7 removed, and the quadrants and geared plato lifted' upwardly aboutth'eir horizontal axes. rIhe forms 9 may then be pushed inwardly todisengage Vfrom the bent shape, and the latter removed from the machine.

v,If shapes of greater curvature are to'be bent, larger forms and largergear plate 3 are substituted in the machine, the sleeves 29 beingadjusted'on the arms to properly positioni the rollers 51. and the faces62being built out with pieces of the required thickness.

In the above explanation we have consid-v v.ered a machine primarilyadapted forbending angles withfone of the legs on the inside of thecurve. f InFigures'S and 9 are shown modificationsto -adapt the machinefor bendingl angles with one of the legs 'on the outside of the curve.This isaccomplished by providing a space between the 'bottomA face 71 oftheroller 51 and the4 upper face 72 of the bracket-41 in which thehorizontal leg 17 of the angle is adaptedto lie. The

operation of the rollers andthe related parts is otherwise the same. Inthis construction the shape ofthe guide boxes 42"-is' suitably altered,as shown in Figure 9, to accommodate the different position of the`angle. In Figure 10is shown a machine adapted for bending channels.

In'this case a riderv 73 is arranged on an extension 74of-e'ach'`bracket 41, and isf adapted'to vbecarried"v roller and the form, so asto 'prevent the around within thev channel, between Vthel 110 verticalwalls 7 6 of the channel `from being y i bent inwardly out ofparallelism,during the bending process. In this construction also,I

the guide boxes 42are altered in formr to accominodateV the differentshape, butotherwise remain the same in function and operation as thoserst-l explained. i

1. .In a machine for bending steel shapes, a bed plate, a form adaptedto'be seated on said bed plate, a second plate pivotally'jarranged'onsaid bed plate for'movement'ina vertical plane for securing andsupporting 125 kon said bed plate for' 'pivotal movementv n bothhorizontal and vertical planes, a roller vbed plate, it cannot buckleand a smooth Aeven curve is imparted tov the angle. When the form, apair of arms mediatelymou'nte arranged on each arm in engagement withthe shape on said form, rne'ans forl moving each arm a horizontal planeto cause'the rollers to press the shape against the form, and means formoving the arms and second plate in the vertical plane to permit thebent shape to beremoved from the form.

2. In a machine for bending steel shapes, a bed plate, a form, means forreleasably securing said form on said bed plate, a block slidablyarranged on said bed plate, a saddle pivotally mounted in a horizontalaxis on said block, a pair of arms pivotally mounted in a vertical axisupon said saddle, a roller arranged on each arm in engagement with theshape on said form, and.

means 'for moving each arm about its pivot.

3. In a machine for bending steel shapes, a bed plate, a form, means forreleasably securing said `form on said bed plate, a pair of armspivotally mounted on said bed plate, a roller arranged on each arm inengagement with the shape on ysaid form, means for moving each arm aboutits pivot, and means on each arm for supporting the shape in advance ofthe rollers comprising a box pivotally arranged on said arm, and shapeengaging rollers disposed therein.

4c. In a machine for bending steel shapes,

a bed plate, a form, a gear-toothed plate for 'securing andsupportingthe form on said 5. Ina machine for bending steel shapes, i

a bed plate, a form disposed on said bed plate, a pair of arms mediatelypivotally mounted on said bed plate, a roller arranged on each arm inengagement with the shape on said form, a segmental grooved rim securedto each arm, and a cable engaging in said grooves and secured adjacentone end of the rims. v

In testimony whereof We have hereunto set our hands at Oakland,California, this 31st day ofJuly, 1919,

MEADER R. AKEY. HERMAN KATZ.

- Inffpresence ofy L. L. M. SALsBURY, J. B. GARDNER.

